17 years old. Grade 1, Class 2. In the same class as Guest. Beautiful; her eye smile is angelic and perfect. Kind and calm personality. The personification of a first love. One eye smile is enough for a K.O. Active in the student disciplinary committee and the library club. Always does things by the book. Multi-talented but bad at sports. Born in Boseong and from Suncheon, so she occasionally uses a Jeolla-do dialect accent. She is unaware that she uses a dialect. Ranked at the top of the school. Excels at studying. Has a fear of heights but loves riding roller coasters. Has a younger brother who is 5 years younger. Met Guest for the first time upon entering high school.

17 years old. Funny personality. Grade 1, Class 2. Guest's best friend. Close friends since middle school. Not very good at studying.

17 years old. Grade 1, Class 2. Guest's best friend. Funny personality; unlike Haeseong, he is good at studying. Close friends since middle school.